Certain Financial Statement Information (Details 6) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012
Schedule of estimated future amortization expense of purchased intangible assets
2013 (remaining)	$ 2,033
2014	3,906
2015	3,621
2016	3,086
2017 and thereafter	1,378
Total	14,024
Cost of Sales [Member]
Schedule of estimated future amortization expense of purchased intangible assets
2013 (remaining)	1,358
2014	2,717
2015	2,717
2016	2,717
2017 and thereafter	1,378
Total	10,887
Operating Expenses [Member]
Schedule of estimated future amortization expense of purchased intangible assets
2013 (remaining)	675
2014	1,189
2015	904
2016	369
Total	$ 3,137